Document custom template development

[silvester747]

After stabilizing the models and interfaces available in templates, document how custom templates can be created:

• Available methods and objects.
• Model contents.
• Required calls to keep everything working.

[davidchisnall]

I am starting to try using asciidoxy and finding that most of the time I want either just the full function prototype, or the prototype and the description (but not the table of the parameters). Is that going to be possible with templates? I tried reading the code but was somewhat lost. Are there any examples of templates in the repo somewhere?